package com.itheima.htmo_01.interceptors;


import com.itheima.htmo_01.utils.JwtUtil;
import com.itheima.htmo_01.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {


        if("/login".equals(request.getRequestURI())
                || "/register".equals(request.getRequestURI())
                || "/upload".equals(request.getRequestURI())
                || request.getRequestURI().startsWith("/downloa")

        ){
            //放行
            return true;
        }


        //令牌验证
        String token =request.getHeader("Authorization");
        //验证token
        try {
            Map<String, Object> claims = JwtUtil.parseToken(token);
            //把业务数据储存到ThreadLocal中

            ThreadLocalUtil.set(claims);

            //放行
            return true;
        }catch (Exception e){
            //http相应状态码为401
            response.setStatus(401);
            //不放行
            return false;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();

    }
}
